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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
20/10/2024, 19:22
Static task
static1
Behavioral task
behavioral1
Sample
2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe
Resource
win7-20240903-en
General
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Target
2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe
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Size
618KB
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MD5
84a0e0284dd3fbda105bdacbfef58aa0
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SHA1
e9f37cede0f6f6d5b47b57a8d3bd5290029fa2fe
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SHA256
8c4365d54648de2dc433943c0e7749b554b2e505541f4f45eacbf8357d4102ca
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SHA512
67b34ab89b02de70d73bc9fed8630755ea187cd12b318a60b51e9d59861aee02276966eca91ccf1e7a7bab24cdf98d722f4c87a22a10de09d803281d1f3e3eb6
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SSDEEP
12288:QmKt6DsU6ngc3kY+KC5gzwGKZ4cuQW8XQAL019bqoFARwp:QR8Y+sxYWkX019bqgWwp
Malware Config
Extracted
phorphiex
http://185.215.113.66/
http://91.202.233.141/
0xCa90599132C4D88907Bd8E046540284aa468a035
TRuGGXNDM1cavQ1AqMQHG8yfxP4QWVSMN6
qph44jx8r9k5xeq5cuf958krv3ewrnp5vc6hhdjd3r
XryzFMFVpDUvU7famUGf214EXD3xNUSmQf
rsXCXBf9SagxV8JfC12d8Bybk84oPdMNN9
AULzfBuUAPfCGAXoG5Vq14aP9s6fx3AH4Z
LTK4xdKPAgFHPLan8kriAD7eY4heyy73mB
MP8GEm8QpYgQYaMo8oM5NQhRBgDGiLZW5Q
4BB7ckkaPTyADc8trtuwDoZxywaR4eNL5cDJ3KBjq9GraN4mUFztf7mLS7WgT7Bh7uPqpjvA4ypVwXKCJ1vvLWWAFvSmDoD
15TssKwtjMtwy4vDLcLsQUZUD2B9f7eDjw85sBNVC5LRPPnC
1BzmrjmKPKSR2hH5BeJySfiVA676E8DYaK
ltc1qt0n3f0t7vz9k0mvcswk477shrxwjhf9sj5ykrp
3PMiLynrGVZ8oEqvoqC4hXD67B1WoALR4pc
3ESHude8zUHksQg1h6hHmzY79BS36L91Yn
DLUzwvyxN1RrwjByUPPzVMdfxNRPGVRMMA
t1J6GCPCiHW1eRdjJgDDu6b1vSVmL5U7Twh
stars125f3mw4xd9htpsq4zj5w5ezm5gags37yxxh6mj
bnb1msyt0djx4ecspfxg5en0ye465kg3kmv9utzml2
bc1ppypcmu3684n648gyj62gjp2rw0xy7w3vwfamatlg29ajp4z52desafa0sr
bc1qc9edl4hzl9jyt8twdad3zjeh2df2znq96tdezd
bitcoincash:qph44jx8r9k5xeq5cuf958krv3ewrnp5vc6hhdjd3r
GBQJMXYXPRIWFMXIFJR35ZB7LRKMB4PHCIUAUFR3TKUL6RDBZVLZEUJ3
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mutex
mmn7nnm8na
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user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36
Signatures
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Modifies security service 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Start = "4" sysppvrdnvs.exe -
Phorphiex payload 1 IoCs
resource yara_rule behavioral2/files/0x000d000000023c06-10.dat family_phorphiex -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" sysppvrdnvs.exe -
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 1572 powershell.exe -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation sysppvrdnvs.exe Key value queried \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation 2295323451.exe -
Executes dropped EXE 4 IoCs
pid Process 1296 8BC5.exe 1344 983223745.exe 3456 sysppvrdnvs.exe 4644 2295323451.exe -
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesOverride = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiSpywareOverride = "1" sysppvrdnvs.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" sysppvrdnvs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Settings = "C:\\Windows\\sysppvrdnvs.exe" 983223745.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\sysppvrdnvs.exe 983223745.exe File opened for modification C:\Windows\sysppvrdnvs.exe 983223745.exe -
Launches sc.exe 5 IoCs
Sc.exe is a Windows utlilty to control services on the system.
pid Process 2136 sc.exe 2088 sc.exe 4720 sc.exe 2064 sc.exe 2060 sc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 11 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 8BC5.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 983223745.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sysppvrdnvs.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 1572 powershell.exe 1572 powershell.exe 4644 2295323451.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1572 powershell.exe Token: SeDebugPrivilege 4644 2295323451.exe -
Suspicious use of WriteProcessMemory 43 IoCs
description pid Process procid_target PID 1608 wrote to memory of 1296 1608 2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe 85 PID 1608 wrote to memory of 1296 1608 2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe 85 PID 1608 wrote to memory of 1296 1608 2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe 85 PID 1296 wrote to memory of 1344 1296 8BC5.exe 93 PID 1296 wrote to memory of 1344 1296 8BC5.exe 93 PID 1296 wrote to memory of 1344 1296 8BC5.exe 93 PID 1344 wrote to memory of 3456 1344 983223745.exe 95 PID 1344 wrote to memory of 3456 1344 983223745.exe 95 PID 1344 wrote to memory of 3456 1344 983223745.exe 95 PID 3456 wrote to memory of 1792 3456 sysppvrdnvs.exe 97 PID 3456 wrote to memory of 1792 3456 sysppvrdnvs.exe 97 PID 3456 wrote to memory of 1792 3456 sysppvrdnvs.exe 97 PID 3456 wrote to memory of 4288 3456 sysppvrdnvs.exe 99 PID 3456 wrote to memory of 4288 3456 sysppvrdnvs.exe 99 PID 3456 wrote to memory of 4288 3456 sysppvrdnvs.exe 99 PID 1792 wrote to memory of 1572 1792 cmd.exe 101 PID 1792 wrote to memory of 1572 1792 cmd.exe 101 PID 1792 wrote to memory of 1572 1792 cmd.exe 101 PID 4288 wrote to memory of 2136 4288 cmd.exe 102 PID 4288 wrote to memory of 2136 4288 cmd.exe 102 PID 4288 wrote to memory of 2136 4288 cmd.exe 102 PID 4288 wrote to memory of 2088 4288 cmd.exe 103 PID 4288 wrote to memory of 2088 4288 cmd.exe 103 PID 4288 wrote to memory of 2088 4288 cmd.exe 103 PID 4288 wrote to memory of 4720 4288 cmd.exe 104 PID 4288 wrote to memory of 4720 4288 cmd.exe 104 PID 4288 wrote to memory of 4720 4288 cmd.exe 104 PID 4288 wrote to memory of 2064 4288 cmd.exe 105 PID 4288 wrote to memory of 2064 4288 cmd.exe 105 PID 4288 wrote to memory of 2064 4288 cmd.exe 105 PID 4288 wrote to memory of 2060 4288 cmd.exe 106 PID 4288 wrote to memory of 2060 4288 cmd.exe 106 PID 4288 wrote to memory of 2060 4288 cmd.exe 106 PID 3456 wrote to memory of 4644 3456 sysppvrdnvs.exe 124 PID 3456 wrote to memory of 4644 3456 sysppvrdnvs.exe 124 PID 4644 wrote to memory of 5016 4644 2295323451.exe 125 PID 4644 wrote to memory of 5016 4644 2295323451.exe 125 PID 4644 wrote to memory of 3124 4644 2295323451.exe 127 PID 4644 wrote to memory of 3124 4644 2295323451.exe 127 PID 5016 wrote to memory of 1776 5016 cmd.exe 129 PID 5016 wrote to memory of 1776 5016 cmd.exe 129 PID 3124 wrote to memory of 3648 3124 cmd.exe 130 PID 3124 wrote to memory of 3648 3124 cmd.exe 130 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-20_84a0e0284dd3fbda105bdacbfef58aa0_cobalt-strike_ryuk.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:1608 -
C:\Users\Admin\AppData\Local\Temp\8BC5.exe"C:\Users\Admin\AppData\Local\Temp\8BC5.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Users\Admin\AppData\Local\Temp\983223745.exeC:\Users\Admin\AppData\Local\Temp\983223745.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1344 -
C:\Windows\sysppvrdnvs.exeC:\Windows\sysppvrdnvs.exe4⤵
- Modifies security service
- Windows security bypass
- Checks computer location settings
- Executes dropped EXE
- Windows security modification
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3456 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c powershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1792 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionPath $env:windir; Add-MpPreference -ExclusionPath $env:TEMP; Add-MpPreference -ExclusionPath $env:USERPROFILE"6⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1572
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop DoSvc & sc stop BITS /wait5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4288 -
C:\Windows\SysWOW64\sc.exesc stop UsoSvc6⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2136
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C:\Windows\SysWOW64\sc.exesc stop WaaSMedicSvc6⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2088
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C:\Windows\SysWOW64\sc.exesc stop wuauserv6⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:4720
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C:\Windows\SysWOW64\sc.exesc stop DoSvc6⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2064
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C:\Windows\SysWOW64\sc.exesc stop BITS /wait6⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2060
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C:\Users\Admin\AppData\Local\Temp\2295323451.exeC:\Users\Admin\AppData\Local\Temp\2295323451.exe5⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4644 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c reg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f6⤵
- Suspicious use of WriteProcessMemory
PID:5016 -
C:\Windows\system32\reg.exereg delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Windows Upgrade Manager" /f7⤵PID:1776
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "Windows Upgrade Manager"6⤵
- Suspicious use of WriteProcessMemory
PID:3124 -
C:\Windows\system32\schtasks.exeschtasks /delete /f /tn "Windows Upgrade Manager"7⤵PID:3648
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Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1System Services
1Service Execution
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
2Windows Service
2Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
2Windows Service
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
108KB
MD51fcb78fb6cf9720e9d9494c42142d885
SHA1fef9c2e728ab9d56ce9ed28934b3182b6f1d5379
SHA25684652bb8c63ca4fd7eb7a2d6ef44029801f3057aa2961867245a3a765928dd02
SHA512cdf58e463af1784aea86995b3e5d6b07701c5c4095e30ec80cc901ffd448c6f4f714c521bf8796ffa8c47538bf8bf5351e157596efaa7ab88155d63dc33f7dc3
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Filesize
8KB
MD5cb8420e681f68db1bad5ed24e7b22114
SHA1416fc65d538d3622f5ca71c667a11df88a927c31
SHA2565850892f67f85991b31fc90f62c8b7791afeb3c08ae1877d857aa2b59471a2ea
SHA512baaabcc4ad5d409267a34ed7b20e4afb4d247974bfc581d39aae945e5bf8a673a1f8eacae2e6783480c8baaeb0a80d028274a202d456f13d0af956afa0110fdf
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Filesize
9KB
MD58d8e6c7952a9dc7c0c73911c4dbc5518
SHA19098da03b33b2c822065b49d5220359c275d5e94
SHA256feb4c3ae4566f0acbb9e0f55417b61fefd89dc50a4e684df780813fb01d61278
SHA51291a573843c28dd32a9f31a60ba977f9a3d4bb19ffd1b7254333e09bcecef348c1b3220a348ebb2cb08edb57d56cb7737f026519da52199c9dc62c10aea236645
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Filesize
83KB
MD506560b5e92d704395bc6dae58bc7e794
SHA1fbd3e4ae28620197d1f02bfc24adaf4ddacd2372
SHA2569eaaadf3857e4a3e83f4f78d96ab185213b6528c8e470807f9d16035daadf33d
SHA512b55b49fc1bd526c47d88fcf8a20fcaed900bfb291f2e3e1186ec196a87127ed24df71385ae04fedcc802c362c4ebf38edfc182013febf4496ddeb66ce5195ee3
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82